Weliveinanagewhentechnologicalinnovationseemstobelimitlesslysoaring.Butforallthesatisfyingspeedwithwhichourgadgetshaveimproved,manyofthemshareafrustratingweakness:thebatteries.Eventhoughtherehavebeensomeimprovementsinlastcentury,batteriesremainfinicky,bulky,expensive,toxicandmaddeninglyshort-lived.T...
